from datetime import datetime
import requests
def fetch(url):
    response=requests.get(url)
    print('Get %s: %s'%(url,response))
t0=datetime.now()
fetch('https://www.baidu.com')
fetch('https://www.taobao.com')
fetch('https://www.qq.com')
t1=datetime.now()
t=t1-t0
print(t.microseconds)
